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I recently needed new tires. So I went to a motorcycle shop listed on here. I saw the whole proccess. It seemed pretty good.
After the tire change, I put about 100 miles on the tires. Then test it for high speeds. Everything is smooth a until 110. Front end is vibrating pretty bad. At 120 vibrating like crazy. So I go back to the shop and tell the shop manager. " dude either the tire is not balanced right or your machine is out of calibration. And he tells me " oh its just the tire pressure. When I left the shop the first time tire pressure was 42/42 as indicated by manufact. specs for zx14.
So he takes it down to 36/ 42 vibration is still the same.

The reason why I think his machine is not calibrated is because there was no vibration before. Also A friend of mine has been going their with his zx10 and he has horrible vibration at 110mph and gets worse at higher speeds and also he keeps blowing his fork seals. he rides high speed a lot so. The shop manager said that he has several zx10's and that they all blow seals and its just normal to keep replacing them.

So I took his front tire and back tire off and took it to cycle gear to have them balance it. Put it back on and 160 mph smooth as butter. I take off mine and do the same smooth as silk.

Does anyone know how often these shops calibrate their machine. I don't want to discredit any shop but WTF. Opinions?

just call and let them know what you did and result. They will appreciate the kindness of not bashing them. It's hard to tell if the machine is out of calibration. That's why manual balance system is the sure thing.

just call and let them know what you did and result. They will appreciate the kindness of not bashing them. It's hard to tell if the machine is out of calibration. That's why manual balance system is the sure thing.

I have tried it before but master techS are not known for their humility.

IF i owned a business, then I would personally want to know. IF you have to, speak with a manager and explain what happened.

IF it was my company, I would offer a refund on the amount that the client paid for the balancing.

Lots of IFs there, but just my 2 cents.

OOO another IF.... IF they do make good with you, then I would give them props for getting the problem fixed. IF they dont, I sure would post who it is so we (MH forum members) dont have the same issue.

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It does sound like the shop's balancer is out of calibration.
Talk to the owner or manager of the shop and not just the service guys. IMHO in the interest of safety for other members of the MH family it might not be a bad idea to name the shop, but it would be polite to give them a chance to fix it.

BTW don't let bigbob bust your chops, I have a feeling he's been to that "airstrip" before...

__________________ Asphalt is for racing... dirt is for growing potatoes. - J. Diester
When seconds count... the police are only minutes away.
Grow up and be a productive member of society already.
Bevo- "I lack skillz"

An unbalanced assembly will have a period before and after where the balance improves. An assembly that has a defect in the recoil of the tire or bend in the wheel would cause an increase shake as speed increases.

and your statement also contradicts itsself. on a closed course where you don't endanger the lives of others... are others on this same closed course? if so, then you are still endangering them

and you misspelled course, if that is the meaning you were going for instead of rough sandpaper

Back to the OP, The machine is supposed to be calibrated pretty often. A bare rim that has been confirmed to be true is used. Call them and tell them, they will either tell you NUH-UHHH or will thank you and give you a refund.